In a flashback episode, the gang ponders the future of the Ted, Robin and Barney love triangle. Meanwhile, Barney accepts a series of challenges from Lily and Robin, on the final season of HOW I MET YOUR MOTHER, Monday, Nov. 11 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Pictured: Alyson Hannigan as Lily, Cobie Smulders as Robin. Photo: Richard Cartwright/FOX ©2013 FOX Television. All Rights Reserved.